- THIS ARTICLE
- Full Text (Rapid PDF)
-
All Versions of this Article:
genetics.106.058115v1
174/1/17 most recent - Alert me when this article is cited
- Alert me if a correction is posted
- SERVICES
- Similar articles in this journal
- Similar articles in PubMed
- Alert me to new issues of the journal
- Download to citation manager
- Reprints & Permissions
- CITING ARTICLES
- Citing Articles via HighWire
- Citing Articles via Google Scholar
- GOOGLE SCHOLAR
- Articles by Dvorak, J.
- Articles by Luo, M.-C.
- Search for Related Content
- PUBMED
- PubMed Citation
- Articles by Dvorak, J.
- Articles by Luo, M.-C.
doi:10.1534/genetics.106.058115
A more recent version of this article appeared on September 1, 2006.
REGULAR RESEARCH PAPERS |
Discovery and Mapping of Wheat Ph1 Suppressors
Jan Dvorak 1*, Karin R. Deal 1 and Ming-Cheng Luo 1
1 University of California, Davis
* To whom correspondence should be addressed. E-mail: jdvorak{at}ucdavis.edu.
Submitted on March 10, 2006
Revised on April 25, 2006
Accepted on 5 May 2006
Pairing between wheat (Triticum turgidum and T. aestivum) homoeologous chromosomes is prevented by the expression of the Ph1 locus on the long arm of chromosome 5B. The genome of Aegilops speltoides suppresses Ph1 expression in wheat x Ae. speltoides hybrids. Suppressors with major effects were mapped as Mendelian loci on the long arms of Ae. speltoides chromosomes 3S and 7S. The chromosome 3S locus was designated Su1-Ph1 and the chromosome 7S locus was designated Su2-Ph1. A QTL with a minor effect was mapped on the short arm of chromosome 5S and was designated QPh.ucd-5S. The expression of Su1-Ph1 and Su2-Ph1 increased homoeologous chromosome pairing in T. aestivum x Ae. speltoides hybrids by 8.4 and 5.8 chiasmata per cell, respectively. Su1-Ph1 was completely epistatic to Su2-Ph1, and the two genes acting together increased homoeologous chromosome pairing in T. aestivum x Ae. speltoides hybrids to the same level as Su1-Ph1 acting alone. QPh.ucd-5S expression increased homoeologous chromosome pairing by 1.6 chiasmata per cell in T. aestivum x Ae. speltoides hybrids and was additive to the expression of Su2-Ph1. It is hypothesized that the products of Su1-Ph1 and Su2-Ph1 affect pairing between homoeologous chromosomes by regulating the expression of Ph1 but the product of QPh.ucd-5S may primarily regulate recombination between homologous chromosomes.
Key Words: Aegilops speltoides, QTL, Triticum, chromosome pairing, homoeologous recombination
This article has been cited by other articles:
 |
|
 |
|
  Z. Liu, K. Adamczyk, M. Manzanares-Dauleux, F. Eber, M.-O. Lucas, R. Delourme, A. M. Chevre, and E. Jenczewski Mapping PrBn and Other Quantitative Trait Loci Responsible for the Control of Homeologous Chromosome Pairing in Oilseed Rape (Brassica napus L.) Haploids Genetics, November 1, 2006; 174(3): 1583 - 1596. [Abstract] [Full Text] [PDF]
|
|